3Com OfficeConnect Series, User Manual

Page: 17 / 129

18
C
HAPTER
2: ISDN LAN M
ODEM
F
UNCTIONALITY
D
ESCRIPTION
Figure 5
ISDN LAN Modem Single Workstation Connection Example
Application Sharing over the LAN
Most operating systems such as Windows 98 and 95 and Macintosh provide the
capability for users on the LAN to share applications, files and printers among
computers. For example, if only one computer has a Web browser, the other users
on the LAN can use that Web browser to access the Internet. Note that speed will
likely be reduced when applications are shared. Refer to your operating system
documentation for instructions on setting up sharing between users on a LAN.
WAN Side Connection
The ISDN LAN Modem allows users to connect to a WAN using either of the
following methods at one time.
■
Two separate connections to two different locations (one per B channel)
■
One high-speed Multilink PPP connection to a single location (combines both
B channels)
Once a WAN connection is established, up to 25 users can share that connection
and access the same location simultaneously. If you desire, you can also restrict
access to certain users.
Two Separate
Connections to Different
Locations.
An ISDN BRI line has two B channels for transmitting data or voice. Because each
B channel is independent, you can connect to two different locations. Once the
connection is established, up to 25 users can share either connection. Figure 6
shows one user connecting to a remote office LAN while another connects to the
Internet.
Figure 6
Two Simultaneous Remote Connections to Different Locations
OfficeConnect®
ISDN LAN Modem
PWR
ISDN B1 B2
3 Com
Alert
Tx Coll 1 2 3 4
LAN STATUS
OfficeConnect
®
ISDN LAN Modem
Public telephone
network
Remote office
LAN
ISDN BRI line
Internet/Intranet or
online service
PWR
ISDN B1 B2
3 Com
Alert
Tx Coll 1 2 3 4
LAN STATUS
Greg—64 Kbps B1
Peter— 64 Kbps B2
Greg
64 Kbps B1
Peter
64 Kbps B2
Greg's PC
Marcia's PC
Jan's PC
Peter's PC
OfficeConnect™
ISDN LAN Modem